Incidents

New Mytob becoming prevalent

Early this morning we released an update for Net-Worm.Win32.Mytob.eg.

Since then we’ve been seeing a clear increase in the number of samples.

This variant doesn’t really differ from earlier variants, it’s just a very basic Mytob. However, it is spreading which means that users should be on the lookout.

It spreads via email and contains a limited IRCBot which only has support for basic features such as downloading files.

As is usually the case with Mytob, the email message that brings the worm closes with a statement purporting to be from an antivirus company, saying that no viruses have been found.

This variant is spreading actively, so be smart, don’t be fooled.

New Mytob becoming prevalent

Your email address will not be published. Required fields are marked *

 

Reports

The leap of a Cycldek-related threat actor

The investigation described in this article started with one such file which caught our attention due to the various improvements it brought to this well-known infection vector.

Lazarus targets defense industry with ThreatNeedle

In mid-2020, we realized that Lazarus was launching attacks on the defense industry using the ThreatNeedle cluster, an advanced malware cluster of Manuscrypt (a.k.a. NukeSped). While investigating this activity, we were able to observe the complete life cycle of an attack, uncovering more technical details and links to the group’s other campaigns.

Sunburst backdoor – code overlaps with Kazuar

While looking at the Sunburst backdoor, we discovered several features that overlap with a previously identified backdoor known as Kazuar. Our observations shows that Kazuar was used together with Turla tools during multiple breaches in past years.

Subscribe to our weekly e-mails

The hottest research right in your inbox